Seat-joint.



No. 648,902. Patented may l, 1900.

c. H. ELY a w. K. PORTER.

SEAT JINT4 (Application led. Sept. 21, 1899.)

(No Model.)

NrTsD TAT'ES" CHARLES Il. ELY ND XVILTlIAM K. PORTER, OF MUSKEGON,MICHGAN.

SEAT-JOINT.

SPECFICATION forming part of Letters Patent No. 648,902, dated May 1,1900; Application iilecl September 2l, 1899. Serial No. 731,181. (Nomodel.)

To all whom t may cow/cern:

Be it known that we, CHARLES lil. FLY and WILLIAM K. PORTER, citizens ofthe United States, residing at Muskegon, in the county of Muskegon andState of Michigan, have invented certain new anduseful Improvements inSeat-Joints, of which the following is a specification.

Our invention relates to the joints employed for attaching the hingingmembers of folding seats to their supporting-frames such,for instance,ascommonly used in schoolseats; and our invention consists in certainnovel features of construction to be hereinafter fully described, andparticularly pointed out in the claims, whereby a hinging-joint isprovided of superior construction as to durability and noiselessness.

In the accompanying drawings, Figure 1 represents a side elevation of asupportingframe, together with the hinging member attached theretothrough the medium of our improved hinge-joint. Fig. 2 is an elevationof the side of the joint opposite to that shown in Fig. l. Fig. 3 is aninner face view of the centering, clamping, and limiting washer. Fig. 4is an inner face View of that portion of the joint to which' the washershown in Fig. 3 is applied. Fig. 5 is an inner facevview of the fixedmember of the joint-Jie wit, the part carried by the supporting-frame.Fig. (i isan edge view of the segregated parts of the joint. Figj7 is aninner face view ofthe part of the joint carried by the hinging member.Fig. 8 is an axial sectional view of the segregated parts of the joint,together with the securing-bolt.

1 represents a portion of the supportingframe, and 2 the hinging member,of a fold.- ing seat, 3 being the tenon by means of which the seatproper or wooden portion is secured to the member 2. 11' represents thesecuringbolt, which carries a nut 5.

The fixed member l is formed with a boss G, having a reduced projection7, upon which latter the hinging member 2 is mounted to turn by means ofits bearing 8. l

y 9 represents a centering, clamping, and limiting washer, which isprovided with an annular rib 10, which fits into a correspondinglyformedgroove 11 in the hinging member 2 and is centrallyperforated at 12 toreceive the securing-bolt 1l, the nut 5 of which latter impinges saidwasher.

123 represents diametrically-located lugs or feathers upon the innerface of the washer 9, which lugs or feathers enter a diametric slot 14in the extension 7 on the boss 6. means the washer 9 is secured againstturning relatively upon the member 1, and Ithe axial dimension of theprojection 7 is such that the washer 9 is clamped against the member 1by means of the securing-bolt 4. Binding pressure upon the hingingmember 2 is thereby prevented, and said hinging member is allowedfreedom of action while being centered with sufficient accuracy by theextension 7 and annular rib 10. i

In order to limit the swinging motion of the member 2 upon the member l,the former.

is provided with lugs 15 and 16, concentrically arranged about thebearing 8 at a radial distance, which causes them to move about the boss6, While said boss 6 on the member 1 is provided with thediametrically-opposed radial stops 17, with which said lugs 15 and 16engage. The parts are so located that when the seat is in position foruse the lugs 15 en; gage, respectively, above and below the stops 17,while when the seat is raised the lug 1G engages beneath one of saidstops 17. The distance between the opposed square faces of the lu gs 15and 16 represents the are through which the seat moves from the positionof its use, as shown in Fig. 1, to its folded position,

toward which it moves in the direction of the arrow shown in Fig. 1. Theswinging member is further limited in its movement by the radial web 18in the annular groove 11, Fig. 4, which plays in the opening 19 in theannular rib lO. (Shown in Fig. 3.) By means of the stops described thehinging member of the seat is suppported rigidly in its position of useon opposite sides of the rotating portion of the joint by parts rigidlyfixed to the support. v

Having thus described our invention, the

following is what we claim as new therein, v

and desire to secure by Letters Patent:

1. The herein-described hinge-joint for seats comprising the member 1having the projection 7, the swinging member 2 having the bearing 8fitting the projection 7 and through which bearing said projection 7 eX-By this ICO tends, the clamping and centering washer 9, said washer 9and member 2 being provided, the one `with a groove and the other with acooperating rib, providing between them a riband-groove connectionconcentric with the bearing in said member 2, saidwasher abutting theend of the projection 7, and the securing-bolt 4;,snbstantialiy as andfor the purposes set forth.

2. The herein-described hinge-joint for seats, comprising the member 1having the boss 6 formed with an extension 7 and with the stops 17integral with said boss; the hingv ing member 2 provided with a bearing8 receiving the projection 7 and with lugs 15 overlapping the boss 6 andengaging the opposite sides of the stops 17; the washer 9 fitted to theface of the member 2 opposite to the lugs 15 and abutting the protrudingend of the extension 7 arib and groove formed upon the respectiveopposed faces of member -2 and washer 9 concentric with I(he bearber 2having a bearing fitting said extension and provided with aconcentric'groove and a radial web in said groove; the clamping,centering and limiting washer formed with an annular rib fitting theannular groove of the member 2, and with an opening therein in which theweb in said groove works, and with a feather-and-,groove connection withthe eX- teusion on the fixed member whereby the washer is prevented fromturning, while permittinga limited swinging movement of the movablemember; and the securing-bolt; all substantially as herein set forth.

. CHARLES H. ELY.

WILLIAM K. PORTER.

Witnesses:

JOHN Q. Ross,` MABEL R. RoDGERs.

